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1SAZ721201R1031 — Thermal overload relay
relayPart number: 1SAZ721201R1031
ABB 1SAZ721201R1031 is a TF42-2.3 three-pole thermal overload relay with an adjustable 1.7–2.3 A current range and trip class 10. It provides motor overload and phase-failure protection, selectable manual or automatic reset, and trip indication. Separate short-circuit protection is required.
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Technical specifications
| Manufacturer | ABB |
|---|---|
| Part number | 1SAZ721201R1031 |
| Category | Electrical & controls |
| Ex Operating Instructions | ATEX - Operating instructions for thermal overload relay TF42 for potentially explosive areas |
| Time-Current Characteristic Curve | Tripping characteristic - Thermal overload relay TF42-2.3 |
| Product Net Width | 45 mm |
| Product Net Height | 88.3 mm |
| Product Net Depth / Length | 70.5 mm |
| Product Net Weight | 0.13 kg |
| Setting Range | 1.7–2.3 A |
| Rated Operational Voltage | Auxiliary Circuit 600 V AC/DC |
| Rated Operational Current (I e ) | 2.3 A |
| Rated Frequency (f) | Auxiliary Circuit 50 Hz |
| Rated Impulse Withstand Voltage (U imp ) | Auxiliary Circuit 6 kV |
| Rated Insulation Voltage (U i ) | 690 V |
| Number of Poles | 3 |
| Number of Auxiliary Contacts NC | 1 |
| Number of Auxiliary Contacts NO | 1 |
| Number of Protected Poles | 3 |
| Conventional Free-air Thermal Current (I th ) | Auxiliary Circuit NC 6 A |
| Rated Operational Current AC-15 (I e ) | (120 V) NC 3 A |
| Rated Operational Current DC-13 (I e ) | (125 V) NC 0.55 A |
| Degree of Protection | IP20 |
| Connecting Capacity Auxiliary Circuit | Flexible with Ferrule 1/2x 0.75 ... 2.5 mm² |
| Connecting Capacity Main Circuit | Flexible with Ferrule 1/2x 0.75 ... 4 mm² |
| Tightening Torque | Auxiliary Circuit 1 ... 1.2 N·m |
| Wire Stripping Length | Auxiliary Circuit 9 mm |
| Power Loss | at Rated Operating Conditions per Pole 1.1 ... 2.0 W |
| Maximum Operating Voltage UL/CSA | Main Circuit 600 V AC |
| Contact Rating UL/CSA | (NC:) B600 |
| Connecting Capacity Main Circuit UL/CSA | Flexible 1/2x 18-10 AWG |
| Published component type | Thermal overload relay |
| Reference status | Published part reference; specification and fitment require confirmation |
| Availability | On request |
| Trip class | 10 |
| Reset mode | Selectable manual or automatic |
| Terminal type | Screw terminals |
| Temperature compensation range | -25 to +60 °C |
Catalogue information may contain errors or be out of date. Full specifications and verified details are available on request. Confirm the part number and equipment fitment with us before ordering.
Product questions
What is the current setting range of ABB TF42-2.3?
ABB 1SAZ721201R1031 is the TF42-2.3 relay, with an adjustable current setting of 1.7–2.3 A and trip class 10. Check the motor nameplate and application requirements before selecting the relay.
Does the TF42-2.3 provide short-circuit protection?
No. This thermal overload relay protects against motor overload and phase failure, but ABB states that separate short-circuit protection is required. The protective device must be selected for the complete circuit.
Can the TF42-2.3 be reset manually or automatically?
Yes. The relay offers selectable manual or automatic reset, along with a trip indication and STOP function.
How is the TF42-2.3 mounted with a contactor?
ABB lists the TF42 for direct mounting on AF09–AF38 contactors; a separate mounting kit is also available. Confirm the exact contactor and equipment requirements before ordering, including the equipment serial number where applicable.
Researched on:
Research information may be outdated. Confirm fitment and specifications with our team before ordering.